/Engine/Source/Runtime/MeshDescription/Public/MeshDescriptionBase.h
Adds a new edge to the mesh and returns its ID
[FEdgeID](API\Runtime\MeshDescription\FEdgeID) CreateEdge ( [FVertexID](API\Runtime\MeshDescription\FVertexID) VertexID0, [FVertexID](API\Runtime\MeshDescription\FVertexID) VertexID1 )